I'm so out of the loop, this is blowing my mind. I'm looking at the site @FriendOfFalcons linked (https://anbernic.com/products/rg35xx), wow. Specs look pretty good, this emulator should easily run any PS1, GBA, Neo Geo game. Hahah what, Neo Geo? There's a blast from the past.
I can't find any info on what Linux distro it ships with, does this thing work out of the box or do you have to install the OS? I presume you supply the ROMs? Holy crap, and they have beefier handhelds that support later-gen platforms. This is awesome.